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Ionic Ratios and Crop Performance. I. Vanadate and Phosphate on Soybean *
Author(s) -
Olness A.,
Nelsen T.,
Rinke J.,
Voorhees W. B.
Publication year - 2000
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1046/j.1439-037x.2000.00429.x
Subject(s) - chemistry , agronomy , soil water , nutrient , soil test , biology , ecology , organic chemistry
Resin‐extraction techniques obtain a suite of extractable elements/ions from a single sample. They are, therefore, capable of characterizing interactions between nutrients and toxic ions on plant growth and of aiding in identification of genetic characteristics of plants required for optimal resource use efficiency. To demonstrate the usefulness of this technique, a field experiment was established on a 3.24‐ha site that included five soil mapping units. The site was divided into three equal portions and planted with corn ( Zea mays L.), soybean ( Glycine max L. Merr.) and wheat ( Triticum aestivum L.). Crops were rotated annually and each rotation was divided into 360 plots measuring about 3 m by 30 m. Soybean varieties designated 9091 and 9061 were planted in consecutive strips of 4 rows at 0.75 m row spacing. Soil samples were extracted with anion and cation resin exchangers. Resin exchangers were eluted with acid and the eluates examined by inductively coupled plasma atomic emission spectroscopy. Soil samples were also examined for bicarbonate extractable P, organic C, total N and pH. Seed yields were different between varieties and soils (P < 0.05). Seed yields ranged from about 2,390–3470 kg ha ‐1 . Seed yields of variety 9061 declined by as much as 20 % (about 540 kg ha ‐1 ) as the resin extractable V:(V + P) ratio increased to 0.15 mol mol ‐1 . Resin extractable V differed between soil mapping units. Soil bicarbonate extractable P, organic C, total N and pH had minimal effects on seed yield.